Spratt, Daniel E. “Results of Photon Radiotherapy for Unresectable Salivary Gland Tumors: Is Neutron Radiotherapy’s Local Control Superior?”. Radiology and Oncology 48, no. 1 (February 3, 2014). Accessed January 18, 2022. https://radioloncol.com/index.php/ro/article/view/1718.